JPS6124127B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a fixed casing, a shaft that is rotationally driven, a rotating head that is attached to the shaft so as to rotate together with the shaft, and a rotary head that is attached to the rotating head in a direction crossing the axis of rotation thereof. It is attached so that it can be moved to
a turret for supporting a cutting tool, and first and second gears comprising a center gear, a planetary gear, and an internal gear so as to be located in separate planes perpendicular to the axis of rotation, respectively, for transversely feeding the turret. A second planetary gear mechanism is provided in the cavity of the casing, the center gear of the first planetary gear mechanism is fixed to the shaft so as to rotate together with the center gear, and the center gear of the second planetary gear mechanism is fixed to the shaft so as to be rotatable relative to the shaft. The gear is a driving gear of the tool post, the internal gear of one of the planetary gear mechanisms is allowed to rotate within the housing, and the central gear of the second planetary gear mechanism is connected to the first gear by gear means that can be selectively actuated.
The present invention relates to a facing and boring device configured to provide a rotational speed different from that of a center gear of a planetary gear mechanism.

Known devices of this kind (German Publication No. 1652658
No.), two planetary gear mechanisms are interlocked with each other by any one of a plurality of worm gears having different gear ratios in order to automatically move the tool rest in the horizontal or radial direction. The turret and the cutting tool attached to it are fed laterally at a speed corresponding to the turret.

Worm gears require a great deal of labor and cost to manufacture. The above-mentioned known configurations also have the disadvantage that they have a relatively high space requirement and thus have an undesirable effect on the structural size of the device.

The object of the invention is to overcome the above-mentioned drawbacks and to provide a simple
An object of the present invention is to provide a means for horizontally transporting a tool post that does not take up much space.

This problem has been solved by the present invention, in which both planetary gears can be rotated coaxially within the housing and selectively locked to the housing by a locking means, in a hollow space of a housing housing the planetary gear mechanism. At least one internal gear having a different number of teeth from the internal gear of the mechanism is provided separately, and the separate internal gear is configured to mesh with a gear integrated with the planetary gear of the second planetary gear mechanism. Solved with.

Since the two internal gears and their respective integral gears are simple to manufacture and do not take up much space, the overall structural size of the facing and boring head is relatively small.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In particular, as is clear from FIG. 1, a cylindrical shaft 4 is rotatably supported within the fixed casing 1 via ball bearings 2 and 3, and a lower end of the shaft is provided with a structure such that it cannot rotate relative to the cylindrical shaft 4. For example, a rotary head 5 is integrally attached. Inside the sliding guide, such as a dovetail guide, provided on the underside of the rotating head,
The tool rest 6 is movable in a direction intersecting the rotational axis of the shaft 4 which is rotationally driven by a driving force supply source (not shown). The direction of this movement is included in the drawing plane in FIG. The tool rest 6 has a guide 7 on its lower surface, and a tool such as a front cutting tool can be attached to the tool rest 6 within this guide. The rotating head 5 has a threaded shaft 8 parallel to the moving direction of the tool post 6.
is rotatably supported, and is engaged with a split nut 9 fixed to the tool rest 6. The threaded shaft 8 is driven via a worm gear 11 fixed to the shaft 8, as will be described in detail later. As the threaded shaft 8 rotates, the tool rest 6 on which a tool (not shown) is mounted moves in a direction perpendicular to the axis of rotation of the shaft 4 in accordance with the direction of rotation of the shaft 8.

In the illustrated embodiment of the facing and boring device, the lateral movement of the tool rest 6 can be achieved in a known manner manually or automatically. Manual traversal is carried out in a known manner with the rotary head 5 stationary by means of a handle crank 12 (FIG. 5), which can be connected to the shaft 8 if required. Such manual lateral movement of the tool post 6 is not a subject of the present invention, and therefore detailed description thereof will be omitted.

The automatic traverse movement of the tool post 6 is also carried out in a known manner using the rotational movement of the shaft 4 without stopping the device, and at this time, while the device is running, the turret 6 can be traversed slowly and continuously. , it is possible to quickly return to the opposite direction. The object of the present invention is to automatically carry out the above-mentioned lateral movement of the tool post 6. Note that the return operation can also be performed in a known manner.

The shaft 4 has the center gear 1 of the first planetary gear mechanism.
3 is fixed so that it rotates integrally with the shaft (Fig. 1). The central gear 13 meshes with at least one planetary gear 14 that meshes with the internal teeth of an internal gear 15 fixed to the housing 1. The planetary gear 14 is a ball bearing 1
It is rotatably supported in an annular flange 16 which is rotatable around the shaft 4 via 7 and 18. Parts 13, 14 and 1
A central gear 1 rotatable relative to the shaft 4 is located in a plane located below the first planetary gear mechanism consisting of
9. A second planetary gear mechanism including a planetary gear 21 meshing with the planetary gear 21 and an internal gear 22 meshing with the planetary gear 21 and rotatable within the housing 1 is disposed. Similar to the planetary gear 14, the planetary gear 2 may be singular or plural.
1 rotates around a shaft 23 that is supported within the flange 16.

The planetary gear mechanism is housed coaxially with the shaft 4 in the space 31 of the fixed casing 1. The internal gear 22 rotatable within the housing 1 has external teeth in addition to internal teeth. The center gear 19 of the second planetary gear mechanism, which is rotatable relative to the shaft 4, is braked by, for example, a spring ring 24 (spring washer).

When the shaft 4 rotates, the center gear 13 of the first planetary gear mechanism fixed thereto drives the planet gear 14, and the planet gear 14 rolls inside the internal gear 15 fixed to the housing. Along with this, the flange 16 rotates around the shaft 4. Since the second planetary gear mechanism has the same gear ratio as the first planetary gear mechanism, the planetary gear 21 supported within the rotating flange 16 rolls within the internal gear 22 and simultaneously meshes with the central gear 19. Since the gear ratios are the same, the center gear 19 does not rotate relative to the shaft 4, and therefore the turret 6 is not moved laterally.

The center gear 19 of the second planetary gear mechanism is the threaded shaft 8
, thus acting as a drive gear for the turret 6 which can be moved laterally. Therefore, as shown in FIG. 4, the center gear 19 meshes with a gear 25 rotatably supported in the tool rest 6, and this gear 25 is integrally coupled with a worm 26 as shown in FIG. are doing. The worm 26 is connected to the worm gear 11 (FIG. 1) which acts as a driving means for the threaded shaft 8. In order to drive the threaded shaft 8 and move the tool rest 6 laterally, it is necessary to give the center gear 19 relative rotation with respect to the shaft 4. When manually moving the tool rest 6 laterally, it is shown in FIG. As shown, the handle crank 12 and two mutually meshing bevel gears 27, 28
is connected to the bevel gear 28 via the internal gear 22.
The gear 29 that meshes with rotates. That is, when the handle crank 12 is operated, the internal gear 22 first rotates, and the internal gear rotates the center gear 19 via the planetary gear 21, and the center gear 19 rotates the threaded shaft 8 via the above-mentioned means. , thus driving the tool rest 6. Such manual lateral movement of the tool post 6 can be performed whether the device is stopped or rotating.

The following means was provided so that the tool rest 6 could be adjusted continuously while the shaft 4 and rotating head 5 were being rotated. Two internal gears 32 and 33 are provided within the space 31 of the housing 1 housing the first and second planetary gear mechanisms coaxially with these gear mechanisms so as to be rotatable relative to the housing. In the illustrated embodiment, these two
The two separate internal gears 32, 33 have sections 13, 14,
15, and between planetary gear mechanisms constituted by 19, 21, and 22, respectively. Internal gear 32, 3
3 is a gear 34 that is integrally combined into a block;
35 and interlock respectively. This block is axis 23
It can be rotated around , and is connected to the planetary gear 21 through a groove/spring joint 36 so as not to be relatively rotatable. As is clear from FIG. 1, both internal gears 32, 33
has a different number of teeth than the internal gears 15, 22 of the two planetary gear mechanisms. For this reason, if the numbers of teeth are the same, the internal diameters of the internal gears 32 and 33 may be formed to be different from the internal diameter of the internal gears, and if the internal diameters are the same, they may be given different numbers of teeth. In this way, the internal gear 32,
33 will provide a different gear ratio than the internal gears 15,22. As is also clear from FIG. 1, the gear ratio between the internal gear 32 and the gear 34 is different from the gear ratio between the internal gear 33 and the gear 35.

As shown in FIGS. 1 and 3, a ratchet plate 38 is pivotally mounted within the housing 1 to a shaft 37 fixed to the housing. On the outer periphery of the internal gears 32, 33 and on the side of the internal gears 38 of the ratchet plate 38, teeth 30 corresponding to each other are provided, as is particularly clear from FIG. Ratchet plate 3
8 is a switching element 39 provided in the casing,
The plate can be arbitrarily pivoted from a neutral position where it does not engage with either of the internal gears 32 and 33 to a position where it engages with the internal gear 32 or 33 via corresponding teeth. The ratchet plate 38 thus acts as a locking means,
Selectively, one of the internal gears 32 and 33 is fixed or locked to the casing 1. When one of the internal gears 32, 33 is fixed to the housing 1, the internal gear 22, which is normally stationary, is forcibly rotated because the gear ratios are different as described above.
As a result, the center tooth 19 rotates relative to the shaft 4,
This relative rotation drives the rotation of the threaded shaft 8 and, therefore, the lateral movement of the tool rest 6, as described above. The lateral movement of the tool post 6 continues as long as the ratchet plate 38 is engaged with the corresponding internal gear 32 or 33.

Switching element 39 and ratchet plate 3
Spring means are provided between the switching elements 39 and 8 in a known manner, thus not shown in detail.
When the gears are in the corresponding positions, the spring means causes the ratchet plate to move against the teeth 3 of the corresponding internal gear 32 or 33.
0. If an overload occurs on the tool rest while the tool rest 6 is being moved horizontally and prevents further horizontal movement, the ratchet plate 38 automatically separates from the teeth 30 by overcoming the biasing force of the spring means. Prevent damage or destruction of equipment.

In the illustrated embodiment, two internal gears 32, 33 are provided to adjust the lateral feed of the tool post 6 at two different speeds. Basically, the turret 6 can be moved laterally with only one internal gear 32 or 33. If three or more types of turret 6 feed speeds are required, three or more internal gears such as internal gears 32 and 33 may be installed in the housing 1 so that they can be locked with corresponding fixing means. .

Like all facing and boring machines, the machine of the invention also provides means for quickly returning the tool rest 6. This will be briefly explained with reference to FIGS. 2 and 7. As is clear from Fig. 1, the above flange 1
Reference numeral 6 includes external teeth that mesh with a gear 41 rotatably supported within the casing 1 . The gear 41 has its shaft 42
It is also movable in the axial direction. As a means for moving the shaft 42, a small lever 43 is rotatably supported within the casing 1. When the lever 43 and thus the shaft 42 are in the appropriate position, the gear 41 interlocks by friction engagement with the conical extension 44 of a separate gear 45, which is connected to the second planetary gear mechanism. Internal gear 2
Occluses with the external teeth of 2. When the lever 43 establishes an interlocking relationship between the gears 41 and 45 while the shaft 4 and therefore the flange 16 are rotating, the internal gear 22 is driven at high speed, and the planetary gear 21, the center gear 19, and the screw Via the worm gear (sections 11, 26) acting on the shaft 8, the tool rest 6 is quickly returned, so that the normally outward working stroke is reversed. The two gears 41 and 45 may be normally maintained in a non-interlocking state by spring means.

The last thing to confirm is that the separate gear means provided between the two planetary gear mechanisms, i.e.
At least one internal gear 32 or 33 and associated gears 34, 35 are connected to the planetary gear 2 when the internal gear is locked by the ratchet plate 38.
It acts so that the rotation speed of No. 1 can be forcibly changed. As a result, the internal gear 22 rotatably supported within the housing 1 begins to rotate at a given gear ratio. The planetary gear 21 ultimately drives the central gear 19 of the second planetary gear mechanism and thus the tool post 6. If neither of the separately provided internal gears 32 and 33 is locked to the housing 1, since the gear ratio is different from that of the gears 34 and 35, these internal gears 32 and 33 will rotate at different speeds, and the second The internal gear 22 of the planetary gear mechanism is stationary.

As is clear from the drawing, the increase in the structural height of the device required for automatic traversing of the tool post 6 is due to the separate internal gear 3.
It is only 2.33 mm thick. This thickness may be much smaller than the space required for the worm gear, so that the overall height of the device is low.

The mechanism of the present invention can be used as a surface cutting device by attaching a front cutting tool to the tool rest 6 described above, rotating the cutting tool to cut the surface of the workpiece, and moving the workpiece in a direction transverse to the rotation axis. In addition, the mechanism of the present invention can be achieved by attaching a boring tool to the tool post 6, rotating the tool, and moving the tool in the direction of the rotation axis relative to the workpiece to cut the workpiece in the depth direction from the surface of the workpiece. Can be used as a boring device.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the face milling and boring device, Fig. 2 is a sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is a sectional view taken along line 3-3 in Fig. 1. 4 is a sectional view taken along line 4--4 in FIG. 1, and FIG. 5 is a partially sectional plan view taken in the direction of arrow A in FIG. 3. , FIG. 6 is a partial sectional view taken along the line 6--6 in FIG. 4, and FIG. 7 is a partial sectional view taken along the line 7--7 in FIG. 1... Housing, 15, 22, 32, 33... Internal gear, 21... Planetary gear, 34, 35... Gear,
31... Blank space, 38... Locking means.

Claims (1)

[Scope of Claims] 1. A fixed casing, a rotationally driven shaft, a rotating head attached to the shaft so as to rotate together with the shaft, and a rotating head capable of moving in a direction intersecting the rotational axis of the rotating head. attached to the rotating head,
a turret for supporting a cutting tool; first and second gears each comprising a center gear, a planetary gear and an internal gear, and are located in separate planes perpendicular to the axis of rotation, respectively, for transversely feeding the turret; A second planetary gear mechanism is provided in the cavity of the casing, the center gear of the first planetary gear mechanism is fixed to the shaft so as to rotate integrally therewith, and the center gear of the second planetary gear mechanism is fixed to the shaft so as to be rotatable relative to the shaft. The gear is a driving gear of the tool post, the internal gear of one of the planetary gear mechanisms is allowed to rotate within the housing, and the central gear of the second planetary gear mechanism is connected to the first gear by gear means that can be selectively actuated.
A surface milling and boring device capable of giving a rotation speed different from that of a center gear of a planetary gear mechanism, the planetary gear mechanism 13, 14, 15; 19, 2
1 and 22, a locking means 38 is provided coaxially with the housing and rotatable within the housing.
At least one internal gear 32, 33, which can be selectively locked to the housing and has a different number of teeth from the internal gears 15, 22 of both planetary gear mechanisms, is provided separately;
A surface milling and boring device characterized in that the separately provided internal gears 32 and 33 mesh with gears 34 and 35 that are integral with the planetary gear 21 of the second planetary gear mechanism. 2. A plurality of mutually independent and separate internal gears 32,
A plurality of gears 34 and 35 integrally formed with 33
2. The device according to claim 1, wherein the device is arranged between both planetary gear mechanisms. 3 Two mutually independent separate internal gears 32, 3
3 and a plurality of integrally formed gears 34, 35
The device according to claim 1 or 2, characterized in that it is provided with: 4 A ratchet plate 3 pivotally attached to the housing 1 so that the locking means of the separate internal gears 32 and 33 can mesh with the teeth 30 provided on the outer periphery of the internal gears 32 and 33.
Claim 1 characterized in that it includes
3. Apparatus according to paragraph 2, paragraph 2 or paragraph 3. 5 When an overload occurs on the turret 6, the internal gear 3
5. Apparatus according to claim 4, characterized in that the ratchet plate is biased by spring means so as to disengage from the teeth 30 of the teeth 2 and 33.